Mitsubishi Motors Development Engineers Reveal Their PHEV Problems

--How has Mitsubishi improved the reliability of its batteries and software?

Product Details

Language
English
Format
PDF
File Size
3.11 MB
Print Length
31 Pages
Publisher
Nikkei Business Publications,Inc.
Published
May 2014
Delivery
Immedate Download

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Report Description

Released at the end of January in 2013, Mitsubishi Motors' plug-in hybrid electric vehicle (PHEV) "Outlander PHEV" has been plagued with defective batteries. Coupled with the overheating and combustion of the Li-ion secondary battery, numerous issues concerning the control software were detected in the vehicle, and recalls were reported. With the rapid advancement of the electrification and computerization of automobiles, the issues at Mitsubishi captured the attention of the entire automotive industry.

Part 1: Causes of the Mitsubishi Outlander PHEV's Battery Combustion Accidents, and Their Solutions --The necessity of adopting viewpoints of different technological fields into EV development

Abstract:

Part 1 will examine the causes of the issues affecting the Mitsubishi's Outlander PHEV's battery, and will clearly explain solutions. The leader of Mitsubishi development team Mr. Kazumasa Iida will describe the roots of the problem. The control software, on the other hand, is an issue reported not only by Mitsubishi, but throughout the industry.

Part 2: Software Issues and Solutions --Increasing issues related to charger/battery control and automatic brakes, and the need for simplification

Abstract:

Part 2 will analyze the trends in recently reported software defects, as well as outline of new developments under way at other key firms are also covered, including Mazda and Calsonic Kansei.

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Table of contents

Part 1: Causes of the Mitsubishi Outlander PHEV's Battery Combustion Accidents, and Their Solutions --The necessity of adopting viewpoints of different technological fields into EV development

Abstract:

Part 1 will examine the causes of the issues affecting the Mitsubishi's Outlander PHEV's battery, and will clearly explain solutions. The leader of Mitsubishi development team Mr. Kazumasa Iida will describe the roots of the problem. The control software, on the other hand, is an issue reported not only by Mitsubishi, but throughout the industry.

Figures:

Fig. 1: The Outlander PHEV's appearance
Fig. 2: An overheated and combusted Li-ion secondary battery after shipment
Table 1: 4 Defect cases of Li-ion secondary battery
Table 2: 2 types of battery cells found defective
Fig. 3: A defect cause found within the screening process
Fig. 4: Workers dropping cells
Fig. 5: Inevitable damage to the separator after dropping a battery cell
Fig. 6: Charging inspection of battery pack
Fig. 7: Misconfigured low-pass filter on the measuring instrument
Fig. 8: Numerous software-related defects
Fig. 9: System diagram of the Outlander PHEV
Fig. A: Moving Foreign Substances During the Screening Process

Supplementary Information 1

A New Screening Process: Product of Thinking Outside the Box

Supplementary Information 2

Kazumasa Iida, Assistant Head Officer of the Development Group Headquarters at Mitsubishi Motors
Transforming Organizational Culture to Improve Product Quality

Part 2: Software Issues and Solutions --Increasing issues related to charger/battery control and automatic brakes, and the need for simplification

Abstract:

Part 2 will analyze the trends in recently reported software defects, as well as outline of new developments under way at other key firms are also covered, including Mazda and Calsonic Kansei.

Figures:

Fig. 1: Number of software defects increasing throughout the automobile industry
Fig. 2: Increase in charging, battery, and automatic brake related defects
Table 1: Major defect cases
Fig. 3: Introduction of ISSM to centrally manage all ECUs
Fig. 4: i-stop involves many ECUs

Supplement:

FTA Diagram Related to Li-ion Secondary Battery Manufacturing Process

Sample PDF

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